Q.1.Match structures given in Column I with functions given in Column II.
Q.2.-Fill in the blanks :
(i) The blood from the heart is transported to all parts of the body by the _____________
(ii) Haemoglobin is present in ___________ cells.
(iii) Arteries and veins are joined by a network of ___________ .
(iv) The rhythmic expansion and contraction of the heart is called ___________
(v) The main excretory product in human beings is ___________
(vi) Sweat contains water and .
(vii) Kidneys eliminate the waste materials in the liquid form called .
(viii) Water reaches great heights in the trees because of suction pull caused by .
Q.3.Choose the correct options:
(a) In plants, water is transported through
(i) Xylem (ii) Phloem (iii) Stomata (iv) Root hair
(b) Water absorption through roots can be increased by keeping the plants
(i) In the shade (ii) in dim light (iii) under the fan (iv) covered with a polythene bag
Q.4.Why is transport of materials necessary in a plant or an animal? Explain.
Q.5.What will happen if there are no platelets in the blood?
Q.6.What are stomata? Give two junctions of stomata.
Q.7.Does transpiration serve any useful function in plants? Explain.
Q.8.What are the components of blood?
Q.9.Why is blood needed by all the parts of a body?
Q.10.What makes the blood look red?
Q.11.Describe the function of the heart.
Q.12.Why is it necessary to excrete waste products?
Q.13.Draw a diagram of the human excretory system and label the various parts.